Reamer



Sept. 9, 1930. G. A. D; VLIEG vv1,775,120

BEAMER v Filed oct. 9, 1925 Q Il SQ g;

Patented Sept. 9, 1930 GERARD A. DE VLIEG, OIF ROCKFORD, ILLINOIS BEAMER Application led October 9, 1925. Serial No. 161,389.

The invention relates to improvements in adjustablereamers, and has particular reference to reamers of the expansion type.

One of the objects of the invention resides in the provision of a novel reamer having an expansible blade unit, and a pilot sleeve with vide a reamer of the above character which is simple and inexpensive in construction, which may be easily, quickly and accurately adjusted, and which is eiicient and long lived 1n use.

Ancillary objects and advantages will become apparent from the following description taken in connection with the accompanying drawings, in which Figure 1 is an elevational view of a reamer embodying the features of my invention.

Fig. 2 is a longitudinal sectional view taken along line 2 2 of Figure 1.

Fig. 3 is a transverse sectional view taken along line 3-'-3 of Figure 1.

Fig. 1 is a fragmentary view partially in section of the driving connection between the shank and the blade unit.

Fig. 5 is a sectional View of the expanding means.

Fig. 6 is a sectional view taken along line 6-6 of Fig. 2.

While the invention is susceptible of various modifications and alternative construcv tions, I have shown in the drawings and will bladeunit 9 which is tubular "in form, i. e. in the form of a sleeve, is loosely and removably mounted on the extension 8.y The back or left end of the blade unit 9 is provided with a collar 10 which is formed with an outwardly flaring taper 11in its inner surface. The tapered portion seats on a conical shoulder 12 (see Fig. 4) on the shank 7 which backs up the unit 9 and serves to locate it concentricallyr of the axis of rotation. A plurality ofspaced longitudinal keyways 13 are formed in the periphery of the shank 7 next to the shoulder 12 and coact with clutch projections 14, on the adjacent end of the collar 10 to provide a suitable driving connection for the blade-unit 9. j

The forward end of the blade unit 9 ,conysists of a section 15 which is formedwith a plurality of blades 16 separated by flutes 17, and which Vis split longitudinally by ,a plurality of slots 18. In the present instance, four slots 18 are provided and the blades 1G are straight. i It is to be understood, however, thaty the blades and slots may be of any suitable rform or number. The slots 18 extend from the collar 10 along certain of the flutes 17 to the forward edge of the section 15.

To adapt the reamer for reaming alined holes it is constructed with a pilot as is common in the art, but it is to be understood that the pilot may be dispensed with if desired. The pilot comprises a tube 19 fitting snugly on the forward end of the extension 8. A pin 20 on the pilot tube 19 projects into a longitudinal keyway 21 in the extension 8 and serves to feather the tube to the extension. The tube 19 may be adjusted longitudinally by means of a nut 22 threaded onto the end of the extension 8.

The back or left end of the tube 19 is provided with an annular wedging member 23 which is threaded externally, and which terminates in a taper 24 engaging a taper 25 on the inner edge of the split end of the blade unit 9. A knurled nut 26 on the wedging member 23 is formed with an inward taper 27 fitting over a taper 28 on the outer edge ofthe unit 9, and serves to limit the outward movement of the blades.

To adjust the reamer the nut 22 is loosened, and the nut 26 is moved into a new kposition on the wedging member 23. The I1ut22 is then turned to move the taperl 24 inwardly along the taper 25 thereby expand- 5 ing the forward end of the blade unit 9 until the taper 28 engages the taper 27. The latter limits the expansion of the reamer, and upon tightening 'the nut 22 serves tov Vlook lthe reamerin'its adjusted position.

10 lIt will be evident that I have provided,

a fewer Simple and inexpensive-nmeeuw: l tion which can be expanded at the forward Y end where the wearis greatest and the need for regrinding most frequent. Only n, the

15 blade'unit 9 need be made of good'steehfand f carefully tempered Furthermore, different kinds of blade units Qmay be substituted, thefeby'lequfng but one Shank and one ad. justing means for a large numberof units,

V2.0 and .reducing the amount of equipment `required. i I claim as'my invention: g g

A reamer having, in combination, a Shank having an "axial extension, an leXpansbl/e gblade unit'mounted on said extension, lsaid I unit'being'slotted'from its forward end along its bladesandbeingtaperedv at' the inner and outer edges `of the front end, `a pilot tube splined to the frontend of saidv eXtensionLand 3f having-fan ,expansion lwedge engaging .the taperv 'on the inner 'front edgeof saidfunit,

means on said extension for vmoving ysaid pilot member longitudinally, and a looking member threadedonto Said i,pilot member 35 andhavinga taper engaging thetaper on the outer front edge of saidunit.z

In testimony whereof, Ir have hereunto afliXed mysignature. f

GrE-RARD'A."DE VLIEG. 

